condition mean min max 0 h after light 3.408105 2.84304 3.97317 4 h after light 3.346255 3.0779 3.61461 8 h after light 3.20131 3.03333 3.36929 4 h after dark 4.95839 4.32024 5.59654 8 h after dark 6.10633 5.72986 6.4828 12 h after dark 4.480645 4.10954 4.85175